It's said that if 9 specific power substations went down in the US then the whole country would lose electricity. It would knock out the entire countries electricity for at least a year. Could you survive a year without electricity? I mean think about it, no heat, no air, hospitals and grocery stores wouldn't be able to function. Supply chains would likely be shut down too. Would you be able to survive it? Here's a blog that discusses it.
http://modernsurvivalblog.com/system...g-it-all-down/
http://time.com/23281/report-u-s-cou...nimal-attacks/